Question

Write four uses of Ultraviolet rays.

Answer 1

uses of ultraviolet rays:

for sterilising purposes

for detecting the purity of gems ,eggs,ghee etc.

In producing vitamin D in food of plants and animals

Answer 2

Hospital use UV lamps to sterilise surgical iquipment and the air in operating theatres. Food and drug companies also use UV lamps to sterilise their products.